Adsorption and electrochemical coupling of carboxyhexyl-substituted bi- and terthiophenes on ITO electrodes

Carboxyalkyl-substituted bithiophenes and terthiophenes, bearing the oligothiophene tail either perpendicularly or linearly linked to the tethering hexanoyl chain, have been adsorbed on ITO electrodes. The monolayers of perpendicular adsorbates are anodically oxidized to polymer layers. The linear terthiophene may be coupled with itself in solution to produce a one-end surface-grafted sexithiophene monolayer.